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Re: Need Guide to Use FT-847 For Digital Modes
Sure, but how do you use the rig with a microphone?
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I don't want to continually move cables around when switching uses. That just leads to breaking things, or forgetting to change something and being frustrated when it doesn't work. Greg KO6TH Dirk Esterline wrote: My 847 worked well with a RigBlaster Nomic connected to the mic input |
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Re: Need Guide to Use FT-847 For Digital Modes
开云体育Hi Bruno,Sorry, I did not mean to insult the radio or their designers.? It is by far my favorite all-mode / all band / satellite rig that I've owned.? Just some of the decisions made when they designed the user interface leave me a bit baffled.? It appears to me that they defined a set of use cases and focused the design on them, but they took the cases as separate things instead of what has evolved to wanting to do ALL of them without moving any cables.? My other radios have a single jack in the back for all the modes.? (And, apologies for conflating Mode with Band.? Yes, the DIN is for the FM modes, with the TRS for the others.) I understand that predicting the future is difficult, but it seems they tried too hard to make things easy, and in my opinion made it harder instead.? It's an all too common problem in user interface design.? There's a "law of things" related to this, which I have found true:? "The structure of a product matches the structure of the organization that created it" (aka "Conway's Law").? It would not surprise me if there were separate teams working on the "digital" and FM sections and their respective interfaces.? Each optimized their design for their use case in isolation, all the way out to the back panel plug.? Anyone who doesn't align with those specific use cases ends up having more work to do, which as things tend to evolve quickly, is pretty common.? Contrast this with the FT-817/818, which has a single DIN connector that feeds any of the modes depending on the radio's setting, with that mode being settable via CAT as well.? I have one configured with a Raspberry Pi running Direwolf, FLDigi, WSJT-X, JS8Call, QSSTV, and probably a few others yet to come, depending on what I want to do at the time.? No moving of cables, no external switching, no secondary (and costly!) interface boxes, perfectly forward-compatible.? Just a few wires and a PTT level shifter for the software that isn't CAT-aware.? Simple.? Done. A clarification.? My use of the term "overload" was from the engineering lingo, meaning that one interface serves multiple different functions.? In this case, as you note, the TRS input combines both PTT and Audio - two separate functions - on one pin.? It has nothing to do with having too much voltage or power, and is a very common interface, universally used with HTs for example.? I did not mean to imply it was a problem; just stating how it worked as different from the DIN port which has them separate.? My point was that either method is probably fine, but pick one. After all that, a question:? Your comment about the audio source chosen when keying the rig from CAT has me puzzled.? If not from the front (Mike ) input, where is the audio selected from? Thanks for the feedback, Greg? KO6TH on6ab wrote:
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Re: Need Guide to Use FT-847 For Digital Modes
Dirk Esterline
My 847 worked well with a RigBlaster Nomic connected to the mic input on the front of the rig.? On Wed, Dec 22, 2021 at 7:21 AM on6ab <bruno.beckers@...> wrote:
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Dirk Esterline PHS Spanish |
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Re: Need Guide to Use FT-847 For Digital Modes
开云体育Bruno, I have an early model 847 and never found out about the update the Yaesu had, so I never got the upgrade or update board. Do you know if the SCU-17 will allow me to do the digital modes?If I could find that board, I would get one and install it, my 847 is like new with bot a lot of use. Gerry Klotz On Dec 22, 2021, at 6:21 AM, on6ab <bruno.beckers@...> wrote:
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Re: Need Guide to Use FT-847 For Digital Modes
Ian
Well said Bruno. 73 de Ian VK6CR On Wed, Dec 22, 2021, at 20:21, on6ab wrote:
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Re: Need Guide to Use FT-847 For Digital Modes
on6ab
Hi Greg, ? With all respect, a healthy approach on these kind of problems should be “what am I doing wrong” instead of blaming the FT847 to fail, to be dumb or to pretend it wants to be smart. The purposes of the PKT and? DATA IN/OUT connectors are explained in the manual on pages 16 (AFSK) and 17 (FM packet). The PKT connector is for FM ( not to be confused with VHF/UHF). The DATA IN/OUT jack is for AFSK ( not to be confused with HF). ? Also, the required resistor and the DC blocking capacitor are NOT there because of overload problems. They’re there in order to add PTT functionality via the same jack. The easiest solution to solve all your DATA and PTT problems is to aquire a Yaesu SCU-17 interface. All computer connectivity go via a single USB connector and the connections to the FT-847 go via a supplied RS232 DB9 cable (CAT) and a supplied 3 pin jack cable (audio and PTT). |
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Re: Need Guide to Use FT-847 For Digital Modes
开云体育Yep, that's pretty much what I wanted to do as well, but driven from a Raspberry Pi 4B.? Got it all wired up, and it failed miserably.? The problem?? No transmit audio.Bottom line is that the 847 appears to want to be "smart".? When the rig is keyed, where should it look for the audio to transmit?? The apparent decision was to follow the connector where the PTT was signaled.? If keyed from the TRS jack (for the HF modes), take it from there and mute the others.? If from the DIN connector (for VHF / UHF packet), take it from there.? The problem:? Where to look if the rig is keyed from CAT?? The unfortunate answer:? The mike.? I can't fathom why they would look to a hand mike's audio for a rig keyed by a computer, but there it is.? Pretty dumb for a smart rig, if you ask me. So the answer to your challenge is to somehow have the two back connectors key the rig when their particular port is being fed audio from the appropriate software.? In my case, FLDIGI goes to the TRS, Direwolf to the DIN.? I managed to cobble things together with several switches to route the audio and PTT to the right place, and that seem to be working.? Do note that the TRS jack overloads the line-in with the PTT function, requiring a resistor and DC blocking capacitor, while the DIN has a separate pin.? There's also the separate 1200 and 9600 baud pins on the DIN to deal with.? You CAN use the CAT for changing frequency, just not for PTT. No clue about the external amp, as I don't have any.? If someone could document all this in a cohesive way, that would be wonderful. Good luck! Greg? KO6TH Micky Corrow wrote:
Greetings. |
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Need Guide to Use FT-847 For Digital Modes
Greetings.
I know it probably has been discussed an unknown number of times previously, but I want to start using my 847 in the digital modes, both on HF as well as 6M + VHF/UHF. I want the members here to create the Ultimate FT-847 Digital Guide. Let me take a moment to describe my setup - I have separate antennas and amplifiers for each output on the 847. Each amp is hard-keyed by the 847, via a special breakout cable I obtained on ebay. It works great. I don't want to use the mic input on the front of the radio for data, I have a mic connected there and I don't want to be switching cables for different bands. I have a laptop running JTDX and FLDigi, I would like to use CAT control to manage frequencies, but it is not cast in stone. I know how to push buttons and spin the dial... I use Log4OM v.2 for logging, and I use JTAlert for needed entities alerts. I have all three (minus FLDigi) apps integrated with each other to work seamlessly. The big unknown is the FT-847.? I would like suggestions on how to integrate the computer with the radio so that I can feed it from the ports on the back and manage the drive and the ALC from the front. The laptop has an internal sound card that I feed some speakers with to hear the alerts, and an inexpensive USB sound card to feed the radio. If at all possible I would like to use CAT control to switch frequencies and modes, but so far that has been problematic for me, so suggestions there wouldn't hurt. In the end I would like to compile all the suggestions and guides into one document and upload it to the Files section so that others don't need to reinvent the wheel each time they dig into digital with the FT-847. Thanks in advance. Micky K1XH? |
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Re: FT847 TCXO-9 mod by ON6AB
on6ab
Thanks Micky, I also added?a mod to add AGC_OFF functionality via the MOX button on the front panel. 73, Bruno Op ma 20 dec. 2021 om 00:49 schreef Micky Corrow <opus@...>: Hi Bruno |
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File /FT-847 Mods/TCXO_9 mod FT847 ON6AB.pdf uploaded
#file-notice
[email protected] Notification
The following files have been uploaded to the Files area of the [email protected] group. By: on6ab <bruno.beckers@...> Description: |
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Need help with this site please.
Russ N4MAV
Good morning Everyone.??
As the primary owner of this groupe, I have one moderator and a part time owner who is in concurance with me.? We need someone to become a full partner with us, this is in case one or both of us go to the Great Ham Shack in the Sky somoe can actually do something on the board.? Either with moderator privledges or as owner.? Bill hasd said he doesn't mind being here, however, he and I are getting to that age.? And as the primary owner, I am not in good enough health to tell you I'll be here tomorrow.?? I'm not sending this as a sob story, but I want to see this group of the Yaesu FT-847 keep open where people can ask questions on the great 847.? You can either replie here or send me an email at n4mav1@....? Either way I'll get it.? Please be aware that I probably not answer right then.? I don't hang out on the cvomputer much after noon unless it is importent.? I have a life to life on the outside sometimes. :)?? I hope everyone has a wonderful Christmas Holiday and a wonderful New Year coming up! 73 and thank for any help on here.?? Russ Abbey, N4MAV Floyd County, Virginia |
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FT847 TCXO-9 mod by ON6AB
on6ab
Hi,
I did the TCXO-9 mod on my FT847 but a little differently (and easier) as to what's already on the internet. It is performing fine and I did not find any unwanted side effects. If you're interested, drop me a mail and I will send it to you. bruno.beckers@... I wanted to upload it to the files menu but that seems to be impossible. 73, Bruno |
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Re: Kuhne QH40A crystal heater problem
on6ab
Hi Andy,
Interesting... I tested my FT847 (with TCXO-9 mod) on FM today but I can't find any tones as you describe. I did the TCXO-9 mod a bit different as to what is available on the internet and I made a detailed pdf file of it. I wanted to add it to the files menu but that seems to be impossible. If you're interested, drop me a mail bruno.beckers@... |
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Re: Kuhne QH40A crystal heater problem
on6ab
Hello Yvan,
Indeed, putting foam over the quartz is a far better solution. Looking at the foam that is over the crystals in my 2004 unit, I suspect it was done at the factory. Meanwhile I improved the stability a lot by mounting a TCXO-9 reference oscillator in the FT847. I wanted to add my TCXO mod to the files on this group but apparently I'm not aloud to do so. |
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Re: Kuhne QH40A crystal heater problem
Hello,
I see one modif for FT847 for better stability, it is simply to put isolation of foam or plastic on quartz. I never have the stability?problem with my 847, who I use for monitoring some sats. With programm Sat32 ant connecting CAT to Com1 (rs232), who is very good combination for following satellites. Vy 73 Yvan HB9CSM
-- Yvan |
Andy Bosworth